Improvement in valves for pumps



To all whom it ma/y concern v and valve-seat, with the form of the casing.

tant

Ew JERSEY;

Lette/raPatent No. 83,302, dated October 20, 1868.

IMPROVEMENT IN VALVES .'EOR PUMPS.

Thfschedule referred to in these Letters Patent and making part of the Hamel Be it known that I, JOHN A. NIoHoLs, of Paterson, in the county of Passaic, and State of New Jersey, have invented a new and useful Improvement in Pump-Valves; and I do hereby declare that the fol-v lowing is a fullclear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of thisspecication, in which- Figure l is a vertical cross-section ofg. 2, through the line x a1, showing vthe manner in which the valve operates on its seat, with the rubber facing on the valve and stop. y.

Figure 2-is a horizontal section of liig. l through the line y y,

showing the operation through the valve (The method in which the valves operate in combination with each other is shown in figs. 3 and 4 in red color.)

Figure 3 is a section of and 'Figure 4 is a section of fig. 3, through the line z z.

Similar letters of refereuceindicate like parts.

This invention relates to an improvement .in the tig. 4, through the line z z,

method of constructing pump-valves, being more parl ticularly designed for thepumps of steam fire-engines, but which may be applied to other pumping-engines; and it consists in constructing the valves, for the pur poses intended, in the manner hereinafter described. x

The case consists of two parts, A A', the former being the outer cylindrical shell, having perforations, C, inits bottom, which forms the seat for the valve B. The part A consists of a perforated plate, B',

theL top of the shell, aud from which depends an annulus, G, having upon its underside rubber packing,

of the valve. The annulus G isconnected to the plate B by radial partitions a, to the inner edges of which is attached a sleeve,v h, forming a guide for the valve-4 stemF. They valve B is perforated at C', and faced covering F', and which forms a stop for the upward movement with rubber,packing F.

-When the valve is raised, the Water flows through perforations C around the outside of the valve, and also through perforations G in the valve, the annulus G being so arranged as not to interrupt the course of the water.

By the arrangementA of the rubber F F', as represented, the noise or clic'k produced by the contact of metallic surfaces is avoided, while leakage of the valve is prevented. l

The manner in which ,the valves operate in combination with each other, when more than one are used, and with the pump, ,is seen in the figs. 3 and 4.

J is the barrel ofthe pump, and the piston is m0v ing in the direction of the arrow. The lower valve is closed, while the upper one is open, and the water is being discharged through the orifice By this method of nonstructing and arranging the valves, it will be seen `that a very large Quantity of water may be thrown through them, while their movement is very slight.

The advantages of this arrangement for ire-engine pumps will be readily understood and appreciated by all interested in the subject.

Having" thus described my invention,

I claim as new, and desire to secure by Letters Patent- The valve-case AA', iu combination with the valve B, constructed Vand arranged tooperate as described.

JOHN A. NICHOLS.

Witnesses:

RIGHD HARELL, WILLIAn H. Haras. 

